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Frontal shield evenly perforated, or with marginal areolae only. Primary orifice with lyrula and/or condyles; peristome typically well developed, with or without oral spines. Ovicell prominent, perforate or imperforate, not closed by zooidal operculum. Pore-chambers or septula present. Avicularia adventitious only; suboral, or lateral to the orifice.

(Hayward and Ryland, 1999)


Creative Commons Attribution 3.0 (CC BY 3.0)

© Sally Rouse

Source: Bryozoa of the British Isles

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